static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1)
{
static struct lock_file lock;
const char *filename;
filename = git_path("%s", pseudoref);
if (old_sha1 && !is_null_sha1(old_sha1)) {
int fd;
unsigned char actual_old_sha1[20];
fd = hold_lock_file_for_update(&lock, filename,
LOCK_DIE_ON_ERROR);
if (fd < 0)
die_errno(_("Could not open '%s' for writing"), filename);
if (read_ref(pseudoref, actual_old_sha1))
die("could not read ref '%s'", pseudoref);
if (hashcmp(actual_old_sha1, old_sha1)) {
warning("Unexpected sha1 when deleting %s", pseudoref);
rollback_lock_file(&lock);
return -1;
}
unlink(filename);
rollback_lock_file(&lock);
} else {
unlink(filename);
}
return 0;
}
int hold_locked_index(struct lock_file *lk, int die_on_error)
{
return hold_lock_file_for_update(lk, get_index_file(),
die_on_error
? LOCK_DIE_ON_ERROR
: 0);
}
static int repack_without_ref(const char *refname)
{
struct ref_list *list, *packed_ref_list;
int fd;
int found = 0;
packed_ref_list = get_packed_refs();
for (list = packed_ref_list; list; list = list->next) {
if (!strcmp(refname, list->name)) {
found = 1;
break;
}
}
if (!found)
return 0;
fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0);
if (fd < 0)
return error("cannot delete '%s' from packed refs", refname);
for (list = packed_ref_list; list; list = list->next) {
char line[PATH_MAX + 100];
int len;
if (!strcmp(refname, list->name))
continue;
len = snprintf(line, sizeof(line), "%s %s\n",
sha1_to_hex(list->sha1), list->name);
/* this should not happen but just being defensive */
if (len > sizeof(line))
die("too long a refname '%s'", list->name);
write_or_die(fd, line, len);
}
return commit_lock_file(&packlock);
}
int pack_refs(unsigned int flags)
{
int fd;
struct pack_refs_cb_data cbdata;
memset(&cbdata, 0, sizeof(cbdata));
cbdata.flags = flags;
fd = hold_lock_file_for_update(&packed, git_path("packed-refs"), 1);
cbdata.refs_file = fdopen(fd, "w");
if (!cbdata.refs_file)
die("unable to create ref-pack file structure (%s)",
strerror(errno));
/* perhaps other traits later as well */
fprintf(cbdata.refs_file, "# pack-refs with: peeled \n");
for_each_ref(handle_one_ref, &cbdata);
if (ferror(cbdata.refs_file))
die("failed to write ref-pack file");
if (fflush(cbdata.refs_file) || fsync(fd) || fclose(cbdata.refs_file))
die("failed to write ref-pack file (%s)", strerror(errno));
/*
* Since the lock file was fdopen()'ed and then fclose()'ed above,
* assign -1 to the lock file descriptor so that commit_lock_file()
* won't try to close() it.
*/
packed.fd = -1;
if (commit_lock_file(&packed) < 0)
die("unable to overwrite old ref-pack file (%s)", strerror(errno));
if (cbdata.flags & PACK_REFS_PRUNE)
prune_refs(cbdata.ref_to_prune);
return 0;
}
int store_rewritten(struct rewritten *list, const char *file)
{
static struct lock_file lock;
struct strbuf buf = STRBUF_INIT;
int fd, i, ret = 0;
fd = hold_lock_file_for_update(&lock, file, LOCK_DIE_ON_ERROR);
for (i = 0; i < list->nr; i++) {
struct rewritten_item *item = &list->items[i];
strbuf_addf(&buf, "%s %s\n", sha1_to_hex(item->from), sha1_to_hex(item->to));
}
if (write_in_full(fd, buf.buf, buf.len) < 0) {
error(_("Could not write to %s"), file);
ret = 1;
goto leave;
}
if (commit_lock_file(&lock) < 0) {
error(_("Error wrapping up %s."), file);
ret = 1;
goto leave;
}
leave:
strbuf_release(&buf);
return ret;
}
struct ref *fetch_pack(struct fetch_pack_args *my_args,
int fd[], struct child_process *conn,
const struct ref *ref,
const char *dest,
int nr_heads,
char **heads,
char **pack_lockfile)
{
struct stat st;
struct ref *ref_cpy;
fetch_pack_setup();
if (&args != my_args)
memcpy(&args, my_args, sizeof(args));
if (args.depth > 0) {
if (stat(git_path("shallow"), &st))
st.st_mtime = 0;
}
if (heads && nr_heads)
nr_heads = remove_duplicates(nr_heads, heads);
if (!ref) {
packet_flush(fd[1]);
die("no matching remote head");
}
ref_cpy = do_fetch_pack(fd, ref, nr_heads, heads, pack_lockfile);
if (args.depth > 0) {
struct cache_time mtime;
struct strbuf sb = STRBUF_INIT;
char *shallow = git_path("shallow");
int fd;
mtime.sec = st.st_mtime;
mtime.nsec = ST_MTIME_NSEC(st);
if (stat(shallow, &st)) {
if (mtime.sec)
die("shallow file was removed during fetch");
} else if (st.st_mtime != mtime.sec
#ifdef USE_NSEC
|| ST_MTIME_NSEC(st) != mtime.nsec
#endif
)
die("shallow file was changed during fetch");
fd = hold_lock_file_for_update(&lock, shallow,
LOCK_DIE_ON_ERROR);
if (!write_shallow_commits(&sb, 0)
|| write_in_full(fd, sb.buf, sb.len) != sb.len) {
unlink_or_warn(shallow);
rollback_lock_file(&lock);
} else {
commit_lock_file(&lock);
}
strbuf_release(&sb);
}
reprepare_packed_git();
return ref_cpy;
}
struct ref *fetch_pack(struct fetch_pack_args *my_args,
int fd[], struct child_process *conn,
const struct ref *ref,
const char *dest,
int nr_heads,
char **heads,
char **pack_lockfile)
{
struct stat st;
struct ref *ref_cpy;
fetch_pack_setup();
memcpy(&args, my_args, sizeof(args));
if (args.depth > 0) {
if (stat(git_path("shallow"), &st))
st.st_mtime = 0;
}
if (heads && nr_heads)
nr_heads = remove_duplicates(nr_heads, heads);
if (!ref) {
packet_flush(fd[1]);
die("no matching remote head");
}
ref_cpy = do_fetch_pack(fd, ref, nr_heads, heads, pack_lockfile);
if (args.depth > 0) {
struct cache_time mtime;
char *shallow = git_path("shallow");
int fd;
mtime.sec = st.st_mtime;
#ifdef USE_NSEC
mtime.usec = st.st_mtim.usec;
#endif
if (stat(shallow, &st)) {
if (mtime.sec)
die("shallow file was removed during fetch");
} else if (st.st_mtime != mtime.sec
#ifdef USE_NSEC
|| st.st_mtim.usec != mtime.usec
#endif
)
die("shallow file was changed during fetch");
fd = hold_lock_file_for_update(&lock, shallow, 1);
if (!write_shallow_commits(fd, 0)) {
unlink(shallow);
rollback_lock_file(&lock);
} else {
commit_lock_file(&lock);
}
}
reprepare_packed_git();
return ref_cpy;
}
static void rewrite_credential_file(const char *fn, struct credential *c,
struct strbuf *extra)
{
if (hold_lock_file_for_update(&credential_lock, fn, 0) < 0)
die_errno("unable to get credential storage lock");
if (extra)
print_line(extra);
parse_credential_file(fn, c, NULL, print_line);
if (commit_lock_file(&credential_lock) < 0)
die_errno("unable to commit credential store");
}
int write_index_as_tree(unsigned char *sha1, struct index_state *index_state, const char *index_path, int flags, const char *prefix)
{
int entries, was_valid, newfd;
struct lock_file *lock_file;
/*
* We can't free this memory, it becomes part of a linked list
* parsed atexit()
*/
lock_file = xcalloc(1, sizeof(struct lock_file));
newfd = hold_lock_file_for_update(lock_file, index_path, LOCK_DIE_ON_ERROR);
entries = read_index_from(index_state, index_path);
if (entries < 0)
return WRITE_TREE_UNREADABLE_INDEX;
if (flags & WRITE_TREE_IGNORE_CACHE_TREE)
cache_tree_free(&index_state->cache_tree);
if (!index_state->cache_tree)
index_state->cache_tree = cache_tree();
was_valid = cache_tree_fully_valid(index_state->cache_tree);
if (!was_valid) {
if (cache_tree_update(index_state, flags) < 0)
return WRITE_TREE_UNMERGED_INDEX;
if (0 <= newfd) {
if (!write_locked_index(index_state, lock_file, COMMIT_LOCK))
newfd = -1;
}
/* Not being able to write is fine -- we are only interested
* in updating the cache-tree part, and if the next caller
* ends up using the old index with unupdated cache-tree part
* it misses the work we did here, but that is just a
* performance penalty and not a big deal.
*/
}
if (prefix) {
struct cache_tree *subtree;
subtree = cache_tree_find(index_state->cache_tree, prefix);
if (!subtree)
return WRITE_TREE_PREFIX_ERROR;
hashcpy(sha1, subtree->sha1);
}
else
hashcpy(sha1, index_state->cache_tree->sha1);
if (0 <= newfd)
rollback_lock_file(lock_file);
return 0;
}
static void write_message(struct strbuf *msgbuf, const char *filename)
{
static struct lock_file msg_file;
int msg_fd = hold_lock_file_for_update(&msg_file, filename,
LOCK_DIE_ON_ERROR);
if (write_in_full(msg_fd, msgbuf->buf, msgbuf->len) < 0)
die_errno(_("Could not write to %s"), filename);
strbuf_release(msgbuf);
if (commit_lock_file(&msg_file) < 0)
die(_("Error wrapping up %s."), filename);
}
static void save_head(const char *head)
{
static struct lock_file head_lock;
struct strbuf buf = STRBUF_INIT;
int fd;
fd = hold_lock_file_for_update(&head_lock, git_path_head_file(), LOCK_DIE_ON_ERROR);
strbuf_addf(&buf, "%s\n", head);
if (write_in_full(fd, buf.buf, buf.len) < 0)
die_errno(_("Could not write to %s"), git_path_head_file());
if (commit_lock_file(&head_lock) < 0)
die(_("Error wrapping up %s."), git_path_head_file());
}
int write_index_as_tree(struct object_id *oid, struct index_state *index_state, const char *index_path, int flags, const char *prefix)
{
int entries, was_valid;
struct lock_file lock_file = LOCK_INIT;
int ret = 0;
hold_lock_file_for_update(&lock_file, index_path, LOCK_DIE_ON_ERROR);
entries = read_index_from(index_state, index_path, get_git_dir());
if (entries < 0) {
ret = WRITE_TREE_UNREADABLE_INDEX;
goto out;
}
if (flags & WRITE_TREE_IGNORE_CACHE_TREE)
cache_tree_free(&index_state->cache_tree);
if (!index_state->cache_tree)
index_state->cache_tree = cache_tree();
was_valid = cache_tree_fully_valid(index_state->cache_tree);
if (!was_valid) {
if (cache_tree_update(index_state, flags) < 0) {
ret = WRITE_TREE_UNMERGED_INDEX;
goto out;
}
write_locked_index(index_state, &lock_file, COMMIT_LOCK);
/* Not being able to write is fine -- we are only interested
* in updating the cache-tree part, and if the next caller
* ends up using the old index with unupdated cache-tree part
* it misses the work we did here, but that is just a
* performance penalty and not a big deal.
*/
}
if (prefix) {
struct cache_tree *subtree;
subtree = cache_tree_find(index_state->cache_tree, prefix);
if (!subtree) {
ret = WRITE_TREE_PREFIX_ERROR;
goto out;
}
oidcpy(oid, &subtree->oid);
}
else
oidcpy(oid, &index_state->cache_tree->oid);
out:
rollback_lock_file(&lock_file);
return ret;
}
int setup_rerere(struct string_list *merge_rr)
{
int fd;
git_config(git_rerere_config, NULL);
if (!is_rerere_enabled())
return -1;
merge_rr_path = git_pathdup("MERGE_RR");
fd = hold_lock_file_for_update(&write_lock, merge_rr_path,
LOCK_DIE_ON_ERROR);
read_rr(merge_rr);
return fd;
}
int create_bundle(struct bundle_header *header, const char *path,
int argc, const char **argv)
{
static struct lock_file lock;
int bundle_fd = -1;
int bundle_to_stdout;
int ref_count = 0;
struct rev_info revs;
bundle_to_stdout = !strcmp(path, "-");
if (bundle_to_stdout)
bundle_fd = 1;
else
bundle_fd = hold_lock_file_for_update(&lock, path,
LOCK_DIE_ON_ERROR);
/* write signature */
write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature));
/* init revs to list objects for pack-objects later */
save_commit_buffer = 0;
init_revisions(&revs, NULL);
/* write prerequisites */
if (compute_and_write_prerequisites(bundle_fd, &revs, argc, argv))
return -1;
argc = setup_revisions(argc, argv, &revs, NULL);
if (argc > 1)
return error(_("unrecognized argument: %s"), argv[1]);
object_array_remove_duplicates(&revs.pending);
ref_count = write_bundle_refs(bundle_fd, &revs);
if (!ref_count)
die(_("Refusing to create empty bundle."));
else if (ref_count < 0)
return -1;
/* write pack */
if (write_pack_data(bundle_fd, &lock, &revs))
return -1;
if (!bundle_to_stdout) {
if (commit_lock_file(&lock))
die_errno(_("cannot create '%s'"), path);
}
return 0;
}
int setup_rerere(struct string_list *merge_rr, int flags)
{
int fd;
git_rerere_config();
if (!is_rerere_enabled())
return -1;
if (flags & (RERERE_AUTOUPDATE|RERERE_NOAUTOUPDATE))
rerere_autoupdate = !!(flags & RERERE_AUTOUPDATE);
merge_rr_path = git_pathdup("MERGE_RR");
fd = hold_lock_file_for_update(&write_lock, merge_rr_path,
LOCK_DIE_ON_ERROR);
read_rr(merge_rr);
return fd;
}
static int save_todo(struct todo_list *todo_list, struct replay_opts *opts)
{
static struct lock_file todo_lock;
const char *todo_path = get_todo_path(opts);
int next = todo_list->current, offset, fd;
fd = hold_lock_file_for_update(&todo_lock, todo_path, 0);
if (fd < 0)
return error_errno(_("could not lock '%s'"), todo_path);
offset = next < todo_list->nr ?
todo_list->items[next].offset_in_buf : todo_list->buf.len;
if (write_in_full(fd, todo_list->buf.buf + offset,
todo_list->buf.len - offset) < 0)
return error_errno(_("could not write to '%s'"), todo_path);
if (commit_lock_file(&todo_lock) < 0)
return error(_("failed to finalize '%s'."), todo_path);
return 0;
}
int setup_rerere(struct string_list *merge_rr, int flags)
{
int fd;
git_rerere_config();
if (!is_rerere_enabled())
return -1;
if (flags & (RERERE_AUTOUPDATE|RERERE_NOAUTOUPDATE))
rerere_autoupdate = !!(flags & RERERE_AUTOUPDATE);
if (flags & RERERE_READONLY)
fd = 0;
else
fd = hold_lock_file_for_update(&write_lock, git_path_merge_rr(),
LOCK_DIE_ON_ERROR);
read_rr(merge_rr);
return fd;
}
static void save_todo(struct commit_list *todo_list, struct replay_opts *opts)
{
static struct lock_file todo_lock;
struct strbuf buf = STRBUF_INIT;
int fd;
fd = hold_lock_file_for_update(&todo_lock, git_path_todo_file(), LOCK_DIE_ON_ERROR);
if (format_todo(&buf, todo_list, opts) < 0)
die(_("Could not format %s."), git_path_todo_file());
if (write_in_full(fd, buf.buf, buf.len) < 0) {
strbuf_release(&buf);
die_errno(_("Could not write to %s"), git_path_todo_file());
}
if (commit_lock_file(&todo_lock) < 0) {
strbuf_release(&buf);
die(_("Error wrapping up %s."), git_path_todo_file());
}
strbuf_release(&buf);
}
static int write_pseudoref(const char *pseudoref, const unsigned char *sha1,
const unsigned char *old_sha1, struct strbuf *err)
{
const char *filename;
int fd;
static struct lock_file lock;
struct strbuf buf = STRBUF_INIT;
int ret = -1;
strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1));
filename = git_path("%s", pseudoref);
fd = hold_lock_file_for_update(&lock, filename, LOCK_DIE_ON_ERROR);
if (fd < 0) {
strbuf_addf(err, "could not open '%s' for writing: %s",
filename, strerror(errno));
return -1;
}
if (old_sha1) {
unsigned char actual_old_sha1[20];
if (read_ref(pseudoref, actual_old_sha1))
die("could not read ref '%s'", pseudoref);
if (hashcmp(actual_old_sha1, old_sha1)) {
strbuf_addf(err, "unexpected sha1 when writing '%s'", pseudoref);
rollback_lock_file(&lock);
goto done;
}
}
if (write_in_full(fd, buf.buf, buf.len) != buf.len) {
strbuf_addf(err, "could not write to '%s'", filename);
rollback_lock_file(&lock);
goto done;
}
commit_lock_file(&lock);
ret = 0;
done:
strbuf_release(&buf);
return ret;
}
static void setup_alternate_shallow(void)
{
struct strbuf sb = STRBUF_INIT;
int fd;
check_shallow_file_for_update();
fd = hold_lock_file_for_update(&shallow_lock, git_path("shallow"),
LOCK_DIE_ON_ERROR);
if (write_shallow_commits(&sb, 0)) {
if (write_in_full(fd, sb.buf, sb.len) != sb.len)
die_errno("failed to write to %s", shallow_lock.filename);
alternate_shallow_file = shallow_lock.filename;
} else
/*
* is_repository_shallow() sees empty string as "no
* shallow file".
*/
alternate_shallow_file = "";
strbuf_release(&sb);
}
static int save_head(const char *head)
{
static struct lock_file head_lock;
struct strbuf buf = STRBUF_INIT;
int fd;
fd = hold_lock_file_for_update(&head_lock, git_path_head_file(), 0);
if (fd < 0) {
rollback_lock_file(&head_lock);
return error_errno(_("could not lock HEAD"));
}
strbuf_addf(&buf, "%s\n", head);
if (write_in_full(fd, buf.buf, buf.len) < 0) {
rollback_lock_file(&head_lock);
return error_errno(_("could not write to '%s'"),
git_path_head_file());
}
if (commit_lock_file(&head_lock) < 0) {
rollback_lock_file(&head_lock);
return error(_("failed to finalize '%s'."), git_path_head_file());
}
return 0;
}
static int write_message(const void *buf, size_t len, const char *filename,
int append_eol)
{
static struct lock_file msg_file;
int msg_fd = hold_lock_file_for_update(&msg_file, filename, 0);
if (msg_fd < 0)
return error_errno(_("could not lock '%s'"), filename);
if (write_in_full(msg_fd, buf, len) < 0) {
rollback_lock_file(&msg_file);
return error_errno(_("could not write to '%s'"), filename);
}
if (append_eol && write(msg_fd, "\n", 1) < 0) {
rollback_lock_file(&msg_file);
return error_errno(_("could not write eol to '%s'"), filename);
}
if (commit_lock_file(&msg_file) < 0) {
rollback_lock_file(&msg_file);
return error(_("failed to finalize '%s'."), filename);
}
return 0;
}
static char *prepare_index(int argc, const char **argv, const char *prefix,
const struct commit *current_head, int is_status)
{
int fd;
struct string_list partial;
struct pathspec pathspec;
int refresh_flags = REFRESH_QUIET;
if (is_status)
refresh_flags |= REFRESH_UNMERGED;
parse_pathspec(&pathspec, 0,
PATHSPEC_PREFER_FULL,
prefix, argv);
if (read_cache_preload(&pathspec) < 0)
die(_("index file corrupt"));
if (interactive) {
char *old_index_env = NULL;
fd = hold_locked_index(&index_lock, 1);
refresh_cache_or_die(refresh_flags);
if (write_cache(fd, active_cache, active_nr) ||
close_lock_file(&index_lock))
die(_("unable to create temporary index"));
old_index_env = getenv(INDEX_ENVIRONMENT);
setenv(INDEX_ENVIRONMENT, index_lock.filename, 1);
if (interactive_add(argc, argv, prefix, patch_interactive) != 0)
die(_("interactive add failed"));
if (old_index_env && *old_index_env)
setenv(INDEX_ENVIRONMENT, old_index_env, 1);
else
unsetenv(INDEX_ENVIRONMENT);
discard_cache();
read_cache_from(index_lock.filename);
commit_style = COMMIT_NORMAL;
return index_lock.filename;
}
/*
* Non partial, non as-is commit.
*
* (1) get the real index;
* (2) update the_index as necessary;
* (3) write the_index out to the real index (still locked);
* (4) return the name of the locked index file.
*
* The caller should run hooks on the locked real index, and
* (A) if all goes well, commit the real index;
* (B) on failure, rollback the real index.
*/
if (all || (also && pathspec.nr)) {
fd = hold_locked_index(&index_lock, 1);
add_files_to_cache(also ? prefix : NULL, &pathspec, 0);
refresh_cache_or_die(refresh_flags);
update_main_cache_tree(WRITE_TREE_SILENT);
if (write_cache(fd, active_cache, active_nr) ||
close_lock_file(&index_lock))
die(_("unable to write new_index file"));
commit_style = COMMIT_NORMAL;
return index_lock.filename;
}
/*
* As-is commit.
*
* (1) return the name of the real index file.
*
* The caller should run hooks on the real index,
* and create commit from the_index.
* We still need to refresh the index here.
*/
if (!only && !pathspec.nr) {
fd = hold_locked_index(&index_lock, 1);
refresh_cache_or_die(refresh_flags);
if (active_cache_changed) {
update_main_cache_tree(WRITE_TREE_SILENT);
if (write_cache(fd, active_cache, active_nr) ||
commit_locked_index(&index_lock))
die(_("unable to write new_index file"));
} else {
rollback_lock_file(&index_lock);
}
commit_style = COMMIT_AS_IS;
return get_index_file();
}
/*
* A partial commit.
*
* (0) find the set of affected paths;
* (1) get lock on the real index file;
* (2) update the_index with the given paths;
* (3) write the_index out to the real index (still locked);
* (4) get lock on the false index file;
* (5) reset the_index from HEAD;
* (6) update the_index the same way as (2);
* (7) write the_index out to the false index file;
* (8) return the name of the false index file (still locked);
*
* The caller should run hooks on the locked false index, and
* create commit from it. Then
* (A) if all goes well, commit the real index;
* (B) on failure, rollback the real index;
* In either case, rollback the false index.
*/
commit_style = COMMIT_PARTIAL;
if (whence != FROM_COMMIT) {
if (whence == FROM_MERGE)
die(_("cannot do a partial commit during a merge."));
else if (whence == FROM_CHERRY_PICK)
die(_("cannot do a partial commit during a cherry-pick."));
}
memset(&partial, 0, sizeof(partial));
partial.strdup_strings = 1;
if (list_paths(&partial, !current_head ? NULL : "HEAD", prefix, &pathspec))
exit(1);
discard_cache();
if (read_cache() < 0)
die(_("cannot read the index"));
fd = hold_locked_index(&index_lock, 1);
add_remove_files(&partial);
refresh_cache(REFRESH_QUIET);
if (write_cache(fd, active_cache, active_nr) ||
close_lock_file(&index_lock))
die(_("unable to write new_index file"));
fd = hold_lock_file_for_update(&false_lock,
git_path("next-index-%"PRIuMAX,
(uintmax_t) getpid()),
LOCK_DIE_ON_ERROR);
create_base_index(current_head);
add_remove_files(&partial);
refresh_cache(REFRESH_QUIET);
if (write_cache(fd, active_cache, active_nr) ||
close_lock_file(&false_lock))
die(_("unable to write temporary index file"));
discard_cache();
read_cache_from(false_lock.filename);
return false_lock.filename;
}
/*
* If value==NULL, unset in (remove from) config,
* if value_regex!=NULL, disregard key/value pairs where value does not match.
* if multi_replace==0, nothing, or only one matching key/value is replaced,
* else all matching key/values (regardless how many) are removed,
* before the new pair is written.
*
* Returns 0 on success.
*
* This function does this:
*
* - it locks the config file by creating ".git/config.lock"
*
* - it then parses the config using store_aux() as validator to find
* the position on the key/value pair to replace. If it is to be unset,
* it must be found exactly once.
*
* - the config file is mmap()ed and the part before the match (if any) is
* written to the lock file, then the changed part and the rest.
*
* - the config file is removed and the lock file rename()d to it.
*
*/
int git_config_set_multivar(const char* key, const char* value,
const char* value_regex, int multi_replace)
{
int i, dot;
int fd = -1, in_fd;
int ret;
char* config_filename;
struct lock_file *lock = NULL;
const char* last_dot = strrchr(key, '.');
if (config_exclusive_filename)
config_filename = xstrdup(config_exclusive_filename);
else
config_filename = git_pathdup("config");
/*
* Since "key" actually contains the section name and the real
* key name separated by a dot, we have to know where the dot is.
*/
if (last_dot == NULL) {
error("key does not contain a section: %s", key);
ret = 2;
goto out_free;
}
store.baselen = last_dot - key;
store.multi_replace = multi_replace;
/*
* Validate the key and while at it, lower case it for matching.
*/
store.key = xmalloc(strlen(key) + 1);
dot = 0;
for (i = 0; key[i]; i++) {
unsigned char c = key[i];
if (c == '.')
dot = 1;
/* Leave the extended basename untouched.. */
if (!dot || i > store.baselen) {
if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
error("invalid key: %s", key);
free(store.key);
ret = 1;
goto out_free;
}
c = tolower(c);
} else if (c == '\n') {
error("invalid key (newline): %s", key);
free(store.key);
ret = 1;
goto out_free;
}
store.key[i] = c;
}
store.key[i] = 0;
/*
* The lock serves a purpose in addition to locking: the new
* contents of .git/config will be written into it.
*/
lock = xcalloc(sizeof(struct lock_file), 1);
fd = hold_lock_file_for_update(lock, config_filename, 0);
if (fd < 0) {
error("could not lock config file %s", config_filename);
free(store.key);
ret = -1;
goto out_free;
}
/*
* If .git/config does not exist yet, write a minimal version.
*/
in_fd = open(config_filename, O_RDONLY);
if ( in_fd < 0 ) {
free(store.key);
if ( ENOENT != errno ) {
error("opening %s: %s", config_filename,
strerror(errno));
ret = 3; /* same as "invalid config file" */
goto out_free;
}
/* if nothing to unset, error out */
if (value == NULL) {
ret = 5;
goto out_free;
}
store.key = (char*)key;
if (!store_write_section(fd, key) ||
!store_write_pair(fd, key, value))
goto write_err_out;
} else {
struct stat st;
char* contents;
size_t contents_sz, copy_begin, copy_end;
int i, new_line = 0;
if (value_regex == NULL)
store.value_regex = NULL;
else {
if (value_regex[0] == '!') {
store.do_not_match = 1;
value_regex++;
} else
store.do_not_match = 0;
store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
if (regcomp(store.value_regex, value_regex,
REG_EXTENDED)) {
error("invalid pattern: %s", value_regex);
free(store.value_regex);
ret = 6;
goto out_free;
}
}
store.offset[0] = 0;
store.state = START;
store.seen = 0;
/*
* After this, store.offset will contain the *end* offset
* of the last match, or remain at 0 if no match was found.
* As a side effect, we make sure to transform only a valid
* existing config file.
*/
if (git_config_from_file(store_aux, config_filename, NULL)) {
error("invalid config file %s", config_filename);
free(store.key);
if (store.value_regex != NULL) {
regfree(store.value_regex);
free(store.value_regex);
}
ret = 3;
goto out_free;
}
free(store.key);
if (store.value_regex != NULL) {
regfree(store.value_regex);
free(store.value_regex);
}
/* if nothing to unset, or too many matches, error out */
if ((store.seen == 0 && value == NULL) ||
(store.seen > 1 && multi_replace == 0)) {
ret = 5;
goto out_free;
}
fstat(in_fd, &st);
contents_sz = xsize_t(st.st_size);
contents = xmmap(NULL, contents_sz, PROT_READ,
MAP_PRIVATE, in_fd, 0);
close(in_fd);
if (store.seen == 0)
store.seen = 1;
for (i = 0, copy_begin = 0; i < store.seen; i++) {
if (store.offset[i] == 0) {
store.offset[i] = copy_end = contents_sz;
} else if (store.state != KEY_SEEN) {
copy_end = store.offset[i];
} else
copy_end = find_beginning_of_line(
contents, contents_sz,
store.offset[i]-2, &new_line);
if (copy_end > 0 && contents[copy_end-1] != '\n')
new_line = 1;
/* write the first part of the config */
if (copy_end > copy_begin) {
if (write_in_full(fd, contents + copy_begin,
copy_end - copy_begin) <
copy_end - copy_begin)
goto write_err_out;
if (new_line &&
write_in_full(fd, "\n", 1) != 1)
goto write_err_out;
}
copy_begin = store.offset[i];
}
/* write the pair (value == NULL means unset) */
if (value != NULL) {
if (store.state == START) {
if (!store_write_section(fd, key))
goto write_err_out;
}
if (!store_write_pair(fd, key, value))
goto write_err_out;
}
/* write the rest of the config */
if (copy_begin < contents_sz)
if (write_in_full(fd, contents + copy_begin,
contents_sz - copy_begin) <
contents_sz - copy_begin)
goto write_err_out;
munmap(contents, contents_sz);
}
if (commit_lock_file(lock) < 0) {
error("could not commit config file %s", config_filename);
ret = 4;
goto out_free;
}
/*
* lock is committed, so don't try to roll it back below.
* NOTE: Since lockfile.c keeps a linked list of all created
* lock_file structures, it isn't safe to free(lock). It's
* better to just leave it hanging around.
*/
lock = NULL;
ret = 0;
out_free:
if (lock)
rollback_lock_file(lock);
free(config_filename);
return ret;
write_err_out:
ret = write_error(lock->filename);
goto out_free;
}
/* if new_name == NULL, the section is removed instead */
int git_config_rename_section(const char *old_name, const char *new_name)
{
int ret = 0, remove = 0;
char *config_filename;
struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
int out_fd;
char buf[1024];
if (config_exclusive_filename)
config_filename = xstrdup(config_exclusive_filename);
else
config_filename = git_pathdup("config");
out_fd = hold_lock_file_for_update(lock, config_filename, 0);
if (out_fd < 0) {
ret = error("could not lock config file %s", config_filename);
goto out;
}
if (!(config_file = fopen(config_filename, "rb"))) {
/* no config file means nothing to rename, no error */
goto unlock_and_out;
}
while (fgets(buf, sizeof(buf), config_file)) {
int i;
int length;
for (i = 0; buf[i] && isspace(buf[i]); i++)
; /* do nothing */
if (buf[i] == '[') {
/* it's a section */
if (section_name_match (&buf[i+1], old_name)) {
ret++;
if (new_name == NULL) {
remove = 1;
continue;
}
store.baselen = strlen(new_name);
if (!store_write_section(out_fd, new_name)) {
ret = write_error(lock->filename);
goto out;
}
continue;
}
remove = 0;
}
if (remove)
continue;
length = strlen(buf);
if (write_in_full(out_fd, buf, length) != length) {
ret = write_error(lock->filename);
goto out;
}
}
fclose(config_file);
unlock_and_out:
if (commit_lock_file(lock) < 0)
ret = error("could not commit config file %s", config_filename);
out:
free(config_filename);
return ret;
}
static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix,
int argc, const char **argv)
{
char tmpdir[PATH_MAX];
struct strbuf info = STRBUF_INIT, lpath = STRBUF_INIT;
struct strbuf rpath = STRBUF_INIT, buf = STRBUF_INIT;
struct strbuf ldir = STRBUF_INIT, rdir = STRBUF_INIT;
struct strbuf wtdir = STRBUF_INIT;
char *lbase_dir, *rbase_dir;
size_t ldir_len, rdir_len, wtdir_len;
const char *workdir, *tmp;
int ret = 0, i;
FILE *fp;
struct hashmap working_tree_dups, submodules, symlinks2;
struct hashmap_iter iter;
struct pair_entry *entry;
struct index_state wtindex;
struct checkout lstate, rstate;
int rc, flags = RUN_GIT_CMD, err = 0;
struct child_process child = CHILD_PROCESS_INIT;
const char *helper_argv[] = { "difftool--helper", NULL, NULL, NULL };
struct hashmap wt_modified, tmp_modified;
int indices_loaded = 0;
workdir = get_git_work_tree();
/* Setup temp directories */
tmp = getenv("TMPDIR");
xsnprintf(tmpdir, sizeof(tmpdir), "%s/git-difftool.XXXXXX", tmp ? tmp : "/tmp");
if (!mkdtemp(tmpdir))
return error("could not create '%s'", tmpdir);
strbuf_addf(&ldir, "%s/left/", tmpdir);
strbuf_addf(&rdir, "%s/right/", tmpdir);
strbuf_addstr(&wtdir, workdir);
if (!wtdir.len || !is_dir_sep(wtdir.buf[wtdir.len - 1]))
strbuf_addch(&wtdir, '/');
mkdir(ldir.buf, 0700);
mkdir(rdir.buf, 0700);
memset(&wtindex, 0, sizeof(wtindex));
memset(&lstate, 0, sizeof(lstate));
lstate.base_dir = lbase_dir = xstrdup(ldir.buf);
lstate.base_dir_len = ldir.len;
lstate.force = 1;
memset(&rstate, 0, sizeof(rstate));
rstate.base_dir = rbase_dir = xstrdup(rdir.buf);
rstate.base_dir_len = rdir.len;
rstate.force = 1;
ldir_len = ldir.len;
rdir_len = rdir.len;
wtdir_len = wtdir.len;
hashmap_init(&working_tree_dups,
(hashmap_cmp_fn)working_tree_entry_cmp, NULL, 0);
hashmap_init(&submodules, (hashmap_cmp_fn)pair_cmp, NULL, 0);
hashmap_init(&symlinks2, (hashmap_cmp_fn)pair_cmp, NULL, 0);
child.no_stdin = 1;
child.git_cmd = 1;
child.use_shell = 0;
child.clean_on_exit = 1;
child.dir = prefix;
child.out = -1;
argv_array_pushl(&child.args, "diff", "--raw", "--no-abbrev", "-z",
NULL);
for (i = 0; i < argc; i++)
argv_array_push(&child.args, argv[i]);
if (start_command(&child))
die("could not obtain raw diff");
fp = xfdopen(child.out, "r");
/* Build index info for left and right sides of the diff */
i = 0;
while (!strbuf_getline_nul(&info, fp)) {
int lmode, rmode;
struct object_id loid, roid;
char status;
const char *src_path, *dst_path;
if (starts_with(info.buf, "::"))
die(N_("combined diff formats('-c' and '--cc') are "
"not supported in\n"
"directory diff mode('-d' and '--dir-diff')."));
if (parse_index_info(info.buf, &lmode, &rmode, &loid, &roid,
&status))
break;
if (strbuf_getline_nul(&lpath, fp))
break;
src_path = lpath.buf;
i++;
if (status != 'C' && status != 'R') {
dst_path = src_path;
} else {
if (strbuf_getline_nul(&rpath, fp))
break;
dst_path = rpath.buf;
}
if (S_ISGITLINK(lmode) || S_ISGITLINK(rmode)) {
strbuf_reset(&buf);
strbuf_addf(&buf, "Subproject commit %s",
oid_to_hex(&loid));
add_left_or_right(&submodules, src_path, buf.buf, 0);
strbuf_reset(&buf);
strbuf_addf(&buf, "Subproject commit %s",
oid_to_hex(&roid));
if (!oidcmp(&loid, &roid))
strbuf_addstr(&buf, "-dirty");
add_left_or_right(&submodules, dst_path, buf.buf, 1);
continue;
}
if (S_ISLNK(lmode)) {
char *content = get_symlink(&loid, src_path);
add_left_or_right(&symlinks2, src_path, content, 0);
free(content);
}
if (S_ISLNK(rmode)) {
char *content = get_symlink(&roid, dst_path);
add_left_or_right(&symlinks2, dst_path, content, 1);
free(content);
}
if (lmode && status != 'C') {
if (checkout_path(lmode, &loid, src_path, &lstate)) {
ret = error("could not write '%s'", src_path);
goto finish;
}
}
if (rmode && !S_ISLNK(rmode)) {
struct working_tree_entry *entry;
/* Avoid duplicate working_tree entries */
FLEX_ALLOC_STR(entry, path, dst_path);
hashmap_entry_init(entry, strhash(dst_path));
if (hashmap_get(&working_tree_dups, entry, NULL)) {
free(entry);
continue;
}
hashmap_add(&working_tree_dups, entry);
if (!use_wt_file(workdir, dst_path, &roid)) {
if (checkout_path(rmode, &roid, dst_path,
&rstate)) {
ret = error("could not write '%s'",
dst_path);
goto finish;
}
} else if (!is_null_oid(&roid)) {
/*
* Changes in the working tree need special
* treatment since they are not part of the
* index.
*/
struct cache_entry *ce2 =
make_cache_entry(rmode, roid.hash,
dst_path, 0, 0);
add_index_entry(&wtindex, ce2,
ADD_CACHE_JUST_APPEND);
add_path(&rdir, rdir_len, dst_path);
if (ensure_leading_directories(rdir.buf)) {
ret = error("could not create "
"directory for '%s'",
dst_path);
goto finish;
}
add_path(&wtdir, wtdir_len, dst_path);
if (symlinks) {
if (symlink(wtdir.buf, rdir.buf)) {
ret = error_errno("could not symlink '%s' to '%s'", wtdir.buf, rdir.buf);
goto finish;
}
} else {
struct stat st;
if (stat(wtdir.buf, &st))
st.st_mode = 0644;
if (copy_file(rdir.buf, wtdir.buf,
st.st_mode)) {
ret = error("could not copy '%s' to '%s'", wtdir.buf, rdir.buf);
goto finish;
}
}
}
}
}
fclose(fp);
fp = NULL;
if (finish_command(&child)) {
ret = error("error occurred running diff --raw");
goto finish;
}
if (!i)
goto finish;
/*
* Changes to submodules require special treatment.This loop writes a
* temporary file to both the left and right directories to show the
* change in the recorded SHA1 for the submodule.
*/
hashmap_iter_init(&submodules, &iter);
while ((entry = hashmap_iter_next(&iter))) {
if (*entry->left) {
add_path(&ldir, ldir_len, entry->path);
ensure_leading_directories(ldir.buf);
write_file(ldir.buf, "%s", entry->left);
}
if (*entry->right) {
add_path(&rdir, rdir_len, entry->path);
ensure_leading_directories(rdir.buf);
write_file(rdir.buf, "%s", entry->right);
}
}
/*
* Symbolic links require special treatment.The standard "git diff"
* shows only the link itself, not the contents of the link target.
* This loop replicates that behavior.
*/
hashmap_iter_init(&symlinks2, &iter);
while ((entry = hashmap_iter_next(&iter))) {
if (*entry->left) {
add_path(&ldir, ldir_len, entry->path);
ensure_leading_directories(ldir.buf);
write_file(ldir.buf, "%s", entry->left);
}
if (*entry->right) {
add_path(&rdir, rdir_len, entry->path);
ensure_leading_directories(rdir.buf);
write_file(rdir.buf, "%s", entry->right);
}
}
strbuf_release(&buf);
strbuf_setlen(&ldir, ldir_len);
helper_argv[1] = ldir.buf;
strbuf_setlen(&rdir, rdir_len);
helper_argv[2] = rdir.buf;
if (extcmd) {
helper_argv[0] = extcmd;
flags = 0;
} else
setenv("GIT_DIFFTOOL_DIRDIFF", "true", 1);
rc = run_command_v_opt(helper_argv, flags);
/*
* If the diff includes working copy files and those
* files were modified during the diff, then the changes
* should be copied back to the working tree.
* Do not copy back files when symlinks are used and the
* external tool did not replace the original link with a file.
*
* These hashes are loaded lazily since they aren't needed
* in the common case of --symlinks and the difftool updating
* files through the symlink.
*/
hashmap_init(&wt_modified, (hashmap_cmp_fn)path_entry_cmp,
NULL, wtindex.cache_nr);
hashmap_init(&tmp_modified, (hashmap_cmp_fn)path_entry_cmp,
NULL, wtindex.cache_nr);
for (i = 0; i < wtindex.cache_nr; i++) {
struct hashmap_entry dummy;
const char *name = wtindex.cache[i]->name;
struct stat st;
add_path(&rdir, rdir_len, name);
if (lstat(rdir.buf, &st))
continue;
if ((symlinks && S_ISLNK(st.st_mode)) || !S_ISREG(st.st_mode))
continue;
if (!indices_loaded) {
static struct lock_file lock;
strbuf_reset(&buf);
strbuf_addf(&buf, "%s/wtindex", tmpdir);
if (hold_lock_file_for_update(&lock, buf.buf, 0) < 0 ||
write_locked_index(&wtindex, &lock, COMMIT_LOCK)) {
ret = error("could not write %s", buf.buf);
rollback_lock_file(&lock);
goto finish;
}
changed_files(&wt_modified, buf.buf, workdir);
strbuf_setlen(&rdir, rdir_len);
changed_files(&tmp_modified, buf.buf, rdir.buf);
add_path(&rdir, rdir_len, name);
indices_loaded = 1;
}
hashmap_entry_init(&dummy, strhash(name));
if (hashmap_get(&tmp_modified, &dummy, name)) {
add_path(&wtdir, wtdir_len, name);
if (hashmap_get(&wt_modified, &dummy, name)) {
warning(_("both files modified: '%s' and '%s'."),
wtdir.buf, rdir.buf);
warning(_("working tree file has been left."));
warning("%s", "");
err = 1;
} else if (unlink(wtdir.buf) ||
copy_file(wtdir.buf, rdir.buf, st.st_mode))
warning_errno(_("could not copy '%s' to '%s'"),
rdir.buf, wtdir.buf);
}
}
if (err) {
warning(_("temporary files exist in '%s'."), tmpdir);
warning(_("you may want to cleanup or recover these."));
exit(1);
} else
exit_cleanup(tmpdir, rc);
finish:
if (fp)
fclose(fp);
free(lbase_dir);
free(rbase_dir);
strbuf_release(&ldir);
strbuf_release(&rdir);
strbuf_release(&wtdir);
strbuf_release(&buf);
return ret;
}
/* return NULL on success, else hostname running the gc */
static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
{
static struct lock_file lock;
static char locking_host[128];
char my_host[128];
struct strbuf sb = STRBUF_INIT;
struct stat st;
uintmax_t pid;
FILE *fp;
int fd, should_exit;
if (pidfile)
/* already locked */
return NULL;
if (gethostname(my_host, sizeof(my_host)))
strcpy(my_host, "unknown");
fd = hold_lock_file_for_update(&lock, git_path("gc.pid"),
LOCK_DIE_ON_ERROR);
if (!force) {
fp = fopen(git_path("gc.pid"), "r");
memset(locking_host, 0, sizeof(locking_host));
should_exit =
fp != NULL &&
!fstat(fileno(fp), &st) &&
/*
* 12 hour limit is very generous as gc should
* never take that long. On the other hand we
* don't really need a strict limit here,
* running gc --auto one day late is not a big
* problem. --force can be used in manual gc
* after the user verifies that no gc is
* running.
*/
time(NULL) - st.st_mtime <= 12 * 3600 &&
fscanf(fp, "%"PRIuMAX" %127c", &pid, locking_host) == 2 &&
/* be gentle to concurrent "gc" on remote hosts */
(strcmp(locking_host, my_host) || !kill(pid, 0) || errno == EPERM);
if (fp != NULL)
fclose(fp);
if (should_exit) {
if (fd >= 0)
rollback_lock_file(&lock);
*ret_pid = pid;
return locking_host;
}
}
strbuf_addf(&sb, "%"PRIuMAX" %s",
(uintmax_t) getpid(), my_host);
write_in_full(fd, sb.buf, sb.len);
strbuf_release(&sb);
commit_lock_file(&lock);
pidfile = git_pathdup("gc.pid");
sigchain_push_common(remove_pidfile_on_signal);
atexit(remove_pidfile);
return NULL;
}
int create_bundle(struct bundle_header *header, const char *path,
int argc, const char **argv)
{
static struct lock_file lock;
int bundle_fd = -1;
int bundle_to_stdout;
const char **argv_boundary = xmalloc((argc + 4) * sizeof(const char *));
const char **argv_pack = xmalloc(6 * sizeof(const char *));
int i, ref_count = 0;
struct strbuf buf = STRBUF_INIT;
struct rev_info revs;
struct child_process rls;
FILE *rls_fout;
bundle_to_stdout = !strcmp(path, "-");
if (bundle_to_stdout)
bundle_fd = 1;
else
bundle_fd = hold_lock_file_for_update(&lock, path,
LOCK_DIE_ON_ERROR);
/* write signature */
write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature));
/* init revs to list objects for pack-objects later */
save_commit_buffer = 0;
init_revisions(&revs, NULL);
/* write prerequisites */
memcpy(argv_boundary + 3, argv + 1, argc * sizeof(const char *));
argv_boundary[0] = "rev-list";
argv_boundary[1] = "--boundary";
argv_boundary[2] = "--pretty=oneline";
argv_boundary[argc + 2] = NULL;
memset(&rls, 0, sizeof(rls));
rls.argv = argv_boundary;
rls.out = -1;
rls.git_cmd = 1;
if (start_command(&rls))
return -1;
rls_fout = xfdopen(rls.out, "r");
while (strbuf_getwholeline(&buf, rls_fout, '\n') != EOF) {
unsigned char sha1[20];
if (buf.len > 0 && buf.buf[0] == '-') {
write_or_die(bundle_fd, buf.buf, buf.len);
if (!get_sha1_hex(buf.buf + 1, sha1)) {
struct object *object = parse_object(sha1);
object->flags |= UNINTERESTING;
add_pending_object(&revs, object, xstrdup(buf.buf));
}
} else if (!get_sha1_hex(buf.buf, sha1)) {
struct object *object = parse_object(sha1);
object->flags |= SHOWN;
}
}
strbuf_release(&buf);
fclose(rls_fout);
if (finish_command(&rls))
return error("rev-list died");
/* write references */
argc = setup_revisions(argc, argv, &revs, NULL);
if (argc > 1)
return error("unrecognized argument: %s", argv[1]);
object_array_remove_duplicates(&revs.pending);
for (i = 0; i < revs.pending.nr; i++) {
struct object_array_entry *e = revs.pending.objects + i;
unsigned char sha1[20];
char *ref;
const char *display_ref;
int flag;
if (e->item->flags & UNINTERESTING)
continue;
if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1)
continue;
if (read_ref_full(e->name, sha1, 1, &flag))
flag = 0;
display_ref = (flag & REF_ISSYMREF) ? e->name : ref;
if (e->item->type == OBJ_TAG &&
!is_tag_in_date_range(e->item, &revs)) {
e->item->flags |= UNINTERESTING;
continue;
}
/*
* Make sure the refs we wrote out is correct; --max-count and
* other limiting options could have prevented all the tips
* from getting output.
*
* Non commit objects such as tags and blobs do not have
* this issue as they are not affected by those extra
* constraints.
*/
if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) {
warning("ref '%s' is excluded by the rev-list options",
e->name);
free(ref);
continue;
}
/*
* If you run "git bundle create bndl v1.0..v2.0", the
* name of the positive ref is "v2.0" but that is the
* commit that is referenced by the tag, and not the tag
* itself.
*/
if (hashcmp(sha1, e->item->sha1)) {
/*
* Is this the positive end of a range expressed
* in terms of a tag (e.g. v2.0 from the range
* "v1.0..v2.0")?
*/
struct commit *one = lookup_commit_reference(sha1);
struct object *obj;
if (e->item == &(one->object)) {
/*
* Need to include e->name as an
* independent ref to the pack-objects
* input, so that the tag is included
* in the output; otherwise we would
* end up triggering "empty bundle"
* error.
*/
obj = parse_object(sha1);
obj->flags |= SHOWN;
add_pending_object(&revs, obj, e->name);
}
free(ref);
continue;
}
ref_count++;
write_or_die(bundle_fd, sha1_to_hex(e->item->sha1), 40);
write_or_die(bundle_fd, " ", 1);
write_or_die(bundle_fd, display_ref, strlen(display_ref));
write_or_die(bundle_fd, "\n", 1);
free(ref);
}
if (!ref_count)
die ("Refusing to create empty bundle.");
/* end header */
write_or_die(bundle_fd, "\n", 1);
/* write pack */
argv_pack[0] = "pack-objects";
argv_pack[1] = "--all-progress-implied";
argv_pack[2] = "--stdout";
argv_pack[3] = "--thin";
argv_pack[4] = "--delta-base-offset";
argv_pack[5] = NULL;
memset(&rls, 0, sizeof(rls));
rls.argv = argv_pack;
rls.in = -1;
rls.out = bundle_fd;
rls.git_cmd = 1;
if (start_command(&rls))
return error("Could not spawn pack-objects");
/*
* start_command closed bundle_fd if it was > 1
* so set the lock fd to -1 so commit_lock_file()
* won't fail trying to close it.
*/
lock.fd = -1;
for (i = 0; i < revs.pending.nr; i++) {
struct object *object = revs.pending.objects[i].item;
if (object->flags & UNINTERESTING)
write_or_die(rls.in, "^", 1);
write_or_die(rls.in, sha1_to_hex(object->sha1), 40);
write_or_die(rls.in, "\n", 1);
}
close(rls.in);
if (finish_command(&rls))
return error ("pack-objects died");
if (!bundle_to_stdout) {
if (commit_lock_file(&lock))
die_errno("cannot create '%s'", path);
}
return 0;
}
int hold_locked_index(struct lock_file *lk, int die_on_error)
{
return hold_lock_file_for_update(lk, get_index_file(), die_on_error);
}
static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p)
{
char *ref_file;
const char *orig_ref = ref;
struct ref_lock *lock;
int last_errno = 0;
int type, lflags;
int mustexist = (old_sha1 && !is_null_sha1(old_sha1));
int missing = 0;
lock = xcalloc(1, sizeof(struct ref_lock));
lock->lock_fd = -1;
ref = resolve_ref(ref, lock->old_sha1, mustexist, &type);
if (!ref && errno == EISDIR) {
/* we are trying to lock foo but we used to
* have foo/bar which now does not exist;
* it is normal for the empty directory 'foo'
* to remain.
*/
ref_file = git_path("%s", orig_ref);
if (remove_empty_directories(ref_file)) {
last_errno = errno;
error("there are still refs under '%s'", orig_ref);
goto error_return;
}
ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, &type);
}
if (type_p)
*type_p = type;
if (!ref) {
last_errno = errno;
error("unable to resolve reference %s: %s",
orig_ref, strerror(errno));
goto error_return;
}
missing = is_null_sha1(lock->old_sha1);
/* When the ref did not exist and we are creating it,
* make sure there is no existing ref that is packed
* whose name begins with our refname, nor a ref whose
* name is a proper prefix of our refname.
*/
if (missing &&
!is_refname_available(ref, NULL, get_packed_refs(NULL), 0)) {
last_errno = ENOTDIR;
goto error_return;
}
lock->lk = xcalloc(1, sizeof(struct lock_file));
lflags = LOCK_DIE_ON_ERROR;
if (flags & REF_NODEREF) {
ref = orig_ref;
lflags |= LOCK_NODEREF;
}
lock->ref_name = xstrdup(ref);
lock->orig_ref_name = xstrdup(orig_ref);
ref_file = git_path("%s", ref);
if (missing)
lock->force_write = 1;
if ((flags & REF_NODEREF) && (type & REF_ISSYMREF))
lock->force_write = 1;
if (safe_create_leading_directories(ref_file)) {
last_errno = errno;
error("unable to create directory for %s", ref_file);
goto error_return;
}
lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags);
return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock;
error_return:
unlock_ref(lock);
errno = last_errno;
return NULL;
}
